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Related Concept Videos

The Hall Effect01:30

The Hall Effect

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Edwin H. Hall, in the year 1879, devised an experiment that could be used to identify the polarity of the predominant charge carriers in a conducting material. From a historical perspective, this experiment was the first to demonstrate that the charge carriers in most metals are negative.
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Magnetic Damping01:17

Magnetic Damping

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Eddy currents can produce significant drag on motion, called magnetic damping. For instance, when a metallic pendulum bob swings between the poles of a strong magnet, significant drag acts on the bob as it enters and leaves the field, quickly damping the motion.
If, however, the bob is a slotted metal plate, the magnet produces a much smaller effect. When a slotted metal plate enters the field, an emf is induced by the change in flux; however, it is less effective because the slots limit the...
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Magnetic Field due to Moving Charges01:23

Magnetic Field due to Moving Charges

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A stationary charge creates and interacts with the electric field, while a moving charge creates a magnetic field.
Consider a point charge moving with a constant velocity. Like the electric field, the magnetic field at any point is directly proportional to the magnitude of the charge and inversely proportional to the square of the distance between the source point and the field point. However, unlike the electric field, the magnetic field is always perpendicular to the plane containing the line...
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Motion Of A Charged Particle In A Magnetic Field01:22

Motion Of A Charged Particle In A Magnetic Field

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A charged particle experiences a force when moving through a magnetic field. Consider the field to be uniform and the charged particle to move perpendicular to it. If the field is in a vacuum, the magnetic field is the dominant factor determining the motion. Since the magnetic force is perpendicular to the direction of motion, a charged particle follows a curved path. The particle continues to follow this curved path until it forms a complete circle. Another way to look at this is that the...
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Magnetic Vector Potential01:15

Magnetic Vector Potential

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In electrostatics, the electric field can be written as the negative gradient of the potential. In magnetostatics, the zero divergence of the magnetic field ensures that the magnetic field can be expressed as the curl of a vector potential. This potential is known as the magnetic vector potential.
Consider an ideal solenoid with n turns per unit length and radius R. If I is the current through the solenoid, the magnetic field inside the solenoid is expressed as the product of vacuum...
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Steady, Laminar Flow Between Parallel Plates01:17

Steady, Laminar Flow Between Parallel Plates

476
Understanding steady, laminar flow between parallel plates is essential for analyzing and designing flow in narrow rectangular channels, commonly found in various water conveyance and drainage systems. The Navier-Stokes equations govern fluid motion and are generally challenging to solve due to their nonlinearity. However, simplifications are possible in certain cases, like the steady laminar flow between parallel plates. For this scenario, we assume steady, incompressible, laminar flow.
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Related Experiment Video

Updated: Oct 19, 2025

Scanning SQUID Study of Vortex Manipulation by Local Contact
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Scanning SQUID Study of Vortex Manipulation by Local Contact

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Dissipationless Vector Drag-Superfluid Spin Hall Effect.

Andrzej Syrwid1, Emil Blomquist1, Egor Babaev1

  • 1Department of Physics, KTH Royal Institute of Technology, SE-106 91 Stockholm, Sweden.

Physical Review Letters
|September 17, 2021
PubMed
Summary

Researchers discovered a new dissipationless phenomenon in superfluid mixtures within optical lattices. One component

Area of Science:

  • Quantum physics
  • Condensed matter physics
  • Ultracold atoms

Background:

  • Single-component superfluids exhibit universal dissipationless flow governed by superfluid velocity and phase gradients.
  • Interacting superfluid mixtures present opportunities for novel quantum phenomena beyond single-component systems.

Purpose of the Study:

  • To demonstrate a novel dissipationless phenomenon in mixtures of interacting bosons confined to optical lattices.
  • To investigate the emergence of noncollinear mass flow in multi-component superfluids.

Main Methods:

  • Theoretical analysis of interacting bosons in specific optical lattice potentials.
  • Derivation of the system's free-energy density.
  • Identification of conditions leading to emergent dissipationless phenomena.

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Magnetically Induced Rotating Rayleigh-Taylor Instability
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Magnetically Induced Rotating Rayleigh-Taylor Instability

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Spatial Separation of Molecular Conformers and Clusters
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Spatial Separation of Molecular Conformers and Clusters

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Related Experiment Videos

Last Updated: Oct 19, 2025

Scanning SQUID Study of Vortex Manipulation by Local Contact
06:53

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Magnetically Induced Rotating Rayleigh-Taylor Instability
06:42

Magnetically Induced Rotating Rayleigh-Taylor Instability

Published on: March 3, 2017

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Spatial Separation of Molecular Conformers and Clusters
10:37

Spatial Separation of Molecular Conformers and Clusters

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Main Results:

  • A new dissipationless effect is demonstrated in interacting bosonic mixtures in optical lattices.
  • A specific lattice configuration enables one component's superflow to drive dissipationless mass flow of the other component.
  • This induced flow is noncollinear with the superfluid velocities of either component.
  • The underlying mechanism involves a vector product-like interaction term in the free-energy density.

Conclusions:

  • The study reveals a novel dissipationless phenomenon termed 'noncollinear entrainment' in multi-component superfluids.
  • This effect is a superfluid analog of the Spin Hall effect, highlighting new avenues in quantum fluid dynamics.